Magnetic-assembly mechanism of superparamagneto-plasmonic nanoparticles on a charged surface

Van Tan Tran; Hongjian Zhou; Seunghun Lee; Seong Cheol Hong; Jeonghyo Kim; Se-Young Jeong; Jaebeom Lee

doi:10.1021/acsami.5b00904

Magnetic-assembly mechanism of superparamagneto-plasmonic nanoparticles on a charged surface

ACS Appl Mater Interfaces. 2015 Apr 29;7(16):8650-8. doi: 10.1021/acsami.5b00904. Epub 2015 Apr 16.

Authors

Van Tan Tran¹, Hongjian Zhou², Seunghun Lee¹, Seong Cheol Hong¹, Jeonghyo Kim¹, Se-Young Jeong¹, Jaebeom Lee¹

Affiliations

¹ †Department of Cogno-Mechatronics Engineering, Pusan National University, Busan 609-735, Republic of Korea.
² §Key Laboratory of Materials Physics, Centre for Environmental and Energy Nanomaterials, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China.

PMID: 25856000
DOI: 10.1021/acsami.5b00904

Abstract

One-dimensional magnetoplasmonic nanochains (MPNCs) were self-assembled using Au-coated Fe3O4 core-shell superparamagnetic nanoparticles (Fe3O4@Au NPs) by applying an external static magnetic field. The assembly mechanism of the Fe3O4@Au NPs was investigated thoroughly, revealing that substrate-particle interactions, van der Waals forces, and magnetic forces play important roles in the formation and control of the MPNCs. Magnetic force microscopy (MFM) and vibrating sample magnetometry (VSM) were used to study the magnetic properties of the MPNCs, which were compared with those of Fe3O4 nanochains.

Keywords: Fe3O4@Au; core−shell nanoparticle; magnetoplasmonic nanoparticle; nanochain; self-assembly.

Publication types

Research Support, Non-U.S. Gov't